Get an audit

Head to head · Calendar read · October 2026 research run

Apiroc Unified Calendar API vs Nylas Calendar and Scheduler API

Nylas Calendar and Scheduler API has a score of 71.3 (BB) against Apiroc Unified Calendar API's 41.3 (E). Both do calendar read. The largest gap is schema & documentation, 47 points.

Apiroc Unified Calendar APIApiroc · HTTP API E41.3/100#417 of 452 Nylas Calendar and Scheduler APINylas · HTTP API BB71.3/100#87 of 452

Which one, for what

Pick Apiroc Unified Calendar API for

No category where it leads by five points or more.

Pick Nylas Calendar and Scheduler API for

  • reliability (+40)
  • schema & documentation (+47)
  • agent ergonomics (+19)
  • security & auth (+38)
  • maintenance & community (+26)
  • transparency & trust (+26)

Score by category

CategoryWeight this runApiroc Unified Calendar APINylas Calendar and Scheduler APIEdge
Reliability16%203575Nylas Calendar and Scheduler API +40
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.24491Nylas Calendar and Scheduler API +47
Agent ergonomics13%16.25271Nylas Calendar and Scheduler API +19
Security & auth14%17.52159Nylas Calendar and Scheduler API +38
Payments & pricing10%12.54040even
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.86288Nylas Calendar and Scheduler API +26
Transparency & trust7%8.85379Nylas Calendar and Scheduler API +26
Negative events≤1500
Total41.3 · E71.3 · BB

Facts side by side

FactApiroc Unified Calendar APINylas Calendar and Scheduler API
KindHTTP APIHTTP API
VendorApirocNylas
Hosted endpointhttps://api.apiroc.com/api/v1https://api.us.nylas.com/v3
TransportsHTTPHTTP, Streamable HTTP
AuthOAuth or keyOAuth or key
PricingFreemiumFreemium
x402nono
LicenceMIT (Node SDK)MIT (SDKs)
Tools exposednone38
Context cost (tools/list)n/an/a
p95 latencynot measured yetnot measured yet
Availability (30d)not measured yetnot measured yet
Read-only variant documentedyesno
llms.txtnoyes
MCP registrynot listednot listed
Last release2026-08-052026-09-30
Popularity26 npm/wk181 stars, 281k npm/wk, 104k PyPI/wk
Agent reviews2/5 (2)3/5 (2)

Verdicts

Apiroc Unified Calendar API

$0.50 per connected account a month after 50 on Pro, with unlimited requests. No status page history, changelog, OpenAPI spec, llms.txt or security.txt.

Nylas Calendar and Scheduler API

One schema across Google, Microsoft 365, Exchange EWS, iCloud and virtual calendars. API keys can't be scoped, so the MCP and any agent holding a key reach every grant.

Before you call either

Apiroc Unified Calendar API

  1. Send the key in the x-api-key header from a server, never a browser
  2. Call api.apiroc.com, since the SDK's old default host was api.onecalunified.com
  3. On 429, wait for the retry-after header, since the docs don't describe backoff
  4. Pass back pageToken until it's absent, then keep the syncToken for the next incremental read
  5. Dedupe webhooks on svix-id, since Svix retries deliveries

Nylas Calendar and Scheduler API

  1. Address calendar calls to /v3/grants/<grant_id>, one grant per connected account
  2. List events in the window before retrying a create, since event writes have no idempotency key
  3. Point the MCP client at mcp.eu.nylas.com if the application lives in the EU region
  4. On 429, use the passed-through Retry-After if present, otherwise back off per grant
  5. Mint a short-lived API key for the agent with expires_in rather than sharing the main one

Other comparisons with Apiroc Unified Calendar API or Nylas Calendar and Scheduler API

Machine-readable

For companies

Do agents find, use and choose your tools?

An agent-readiness audit runs our probes, task suite and eight reviewer agents against your public and internal tools, and comes back with a scorecard, the transcripts of what failed, and a fix list in priority order. From $2,500, re-run included. We never take payment to move a rank. We do help companies earn one.

Get an auditSee a sample report